Sewing-machine shuttle



'June 2, 192s.

` l 1,540,338" H.. G. JoHNsoN SEWING-MACHINE SHUTTLE Filed June 21. 1922 Inver nigga;

.Patented June 2, 1925.

HENRY G. JOHNSON, F EAST HAMPTON, CONNECTICUT, ASSIGNOR T0 SUMMIT THREAD COMPANY, 0F EAST HAMPTON, CGNNECTECUT, l CORPOR/,TTON 0F MAINE.

SENING-MACHTNE SHUTTLE.

Application filed June 2l, 1922. Serial No. 569,889.

To all whom t may concern Be it known that i, HENRY JOHNSON, a citizen of the United States, residing at East Hampton, in the count-y of Middlesex and State of Connecticut, have invented new and useful Improvements in Sewing-liahine Shuttles, of which the following is a specification.

This invention relates to a rotary shuttle 0 which includes a flat sided circular body portion, and an annular wall projecting from one side of the body portion and rotatable therewith, the body portion and wall forming a bobbin chamber which is closed at one end by the body portion, and open at the opposite end. and a post secured to the body portion, and occupying the center of the bobbin chamber' to form a bearing on which a bobbin, located in said chamber, may rotate.

The object of the invention is to enable a ready wound bobbin composed of a tubular core or cop tube and an annular winding of thread thereon, to be used advantageously,

fifi in a shuttle characterized as above stated.

The invention is embodied in the improvenients hereinafter described and claimed Of the accompanying drawings forming aI part of this specification Figure 1 is a side View of a shuttle embodying the invention, the bobbin being removed.

Figure 2 is a section on line 22 of Figure 1.

Figure 3 is a View similar to Figure 2 showing the bobbin in place.

Figure t is a sectional view of the post.

Figure 5 is a sectional view of the flanged tube hereinafter described.

perspective view of a ready portion 12, and is open at the opposite end. 1lrepresents a cylindrical post which is a tube, the bore of which is open at the outer end of the post. The inner end of the post is formed by a head 15, having an orifice receiving an attaching screw 16 whereby 60 the post is secured to the body portion 12.

The construction thus far described embodies nothing new, and it should be understood that the entire construction shown by the drawing and not hereinafter described, 65 and the general operation of a shuttle embodying said construction are well known.

In carrying out my invention, I modify the form of the post, and combine therewith a flanged sleeve, as next described.

The outer end of the post is provided with a peripheral enlargement forming an inwardly facing annular stop shoulder 18 of greater' diameter than the portion of the post between said enlargement and the inner end of the post. 19 represents a tube to one end of which is fixed a flat sided annular flange 20. The tube 19 is formed to have a frictional lit on the post 14, the length of the tube being such that its outer end contacts with the stop shoulder 18, and its flange 2O contacts with the body portion 12, the tube and flange being confined in the bobbin chamber by the stop shoulder. The diameter of the tube is such that its periphery is substantially flush with the periphery of the enlargement forming the stop shoulder, so that the core or cop tube 21 of a ready wound bobbin is adapted to be pressed onto the post and tube, and witnf drawn therefrom. When the bobbin is fully inserted in the chamber, one end of the thread winding 22 of the bobbin contacts with the flange 20. The core 21 is formed to have a close frictional t on the tube 19, so that the bobbin and tube rotate together as the thread is drawn from 'the bobbin. The tube, while fitting the post more loosely, has a sufficient frictional engagement with the post to prevent undesirably loose and free rotation of the tube and the bobbin.

rThe flange 2O is of greater diameter than the bobbin, so that the thread cannot be caught between the inner end of the bobbin and the body portion 12 of the shuttle. vThe 105 frictional contact of the flange with the body portion aids in preventing loose rota` tion of the bobbin. It will be understood that the tube 1) is placed on the post before the latter is 4attached by the screw 16 to the body portion 12.

I Claim:

A sewing niaehi-ne lshuttle comprising :a body portion having tor-reed therein a Circular bobbin chamber open at one end, a. sleeve, adapted to have a bobbin .core slipped thereover, arranged Within said chamber and provided at its inner vend With an annun lar iiange of substantiallyv the saine diameter as the Chamber, a post extending through Sleeve ahnte, :and -a screw1 having its head AWithin the `socket in the post, extending through the inner end of the post and securing it .againet the closed end of the bobbin chamber.

n testimony Jwhereof I have affixed my signature.

HENRY G. JOHNSON. 

